ARM: orion/gpio: use new line value setter callbacks

ARM: orion/gpio: use new line value setter callbacks

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20250407-gpiochip-set-rv-arm-v1-1-9e4a914c7fd4@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>